74F676SCX

© 2002 Fairchild Semiconductor Corporation DS009588 www.fairchildsemi.com
April 1988
Revised January 2002
74F676 16-Bit Serial/Parallel-In, Serial-Out Shift Register
74F676
16-Bit Serial/Parallel-In, Serial-Out Shift Register
General Description
The 74F676 contains 16 flip-flops with provision for syn-
chronous parallel or serial entry and serial output. When
the Mode (M) input is HIGH, information present on the
parallel data (P
0
–P
15
) inputs is entered on the falling edge
of the Clock Pulse (CP
) input signal. When M is LOW, data
is shifted out of the most significant bit position while infor-
mation present on the Serial (SI) input shifts into the least
significant bit position. A HIGH signal on the Chip Select
(CS
) input prevents both parallel and serial operations.
Features
16-bit parallel-to-serial conversion
16-bit serial-in, serial-out
Chip select control
Slim 24 lead 300 mil package
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter X to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Order Number Package Number Package Description
74F676SC M24B 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74F676PC N24A 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-011, 0.600" Wide
74F676SPC N24C 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
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74F676
Unit Loading/Fan Out
Functional Description
The 16-bit shift register operates in one of three modes, as
indicated in the Shift Register Operations Table.
HOLD— a HIGH signal on the Chip Select (CS
) input pre-
vents clocking, and data is stored in the sixteen registers.
Shift/Serial Load— data present on the SI pin shifts into
the register on the falling edge of CP
. Data enters the Q
0
position and shifts toward Q
15
on successive clocks, finally
appearing on the SO pin.
Parallel Load— data present on P
0
P
15
are entered into
the register on the falling edge of CP
. The SO output repre-
sents the Q
15
register output.
To prevent false clocking, CP
must be LOW during a
LOW-to-HIGH transition of CS
.
Shift Register Operations Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
= HIGH-to-LOW Transition
Block Diagram
Pin Names Description
U.L.
Input I
IH
/I
IL
HIGH/LOW
Output I
OH
/I
OL
P
0
P
15
Parallel Data Inputs 1.0/1.0 20 µA/0.6 mA
CS
Chip Select Input (Active LOW) 1.0/1.0 20 µA/0.6 mA
CP
Clock Pulse Input (Active LOW) 1.0/1.0 20 µA/0.6 mA
M Mode Select Input 1.0/1.0 20
µA/0.6 mA
SI Serial Data Input 1.0/1.0 20
µA/0.6 mA
SO Serial Output 50/33.3
1 mA/20 mA
Control Input
Operating Mode
CS
MCP
HXXHold
LL
Shift/Serial Load
LH
Parallel Load
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74F676
Absolute Maximum Ratings(Note 1) Recommended Operating
Conditions
Note 1: Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Storage Temperature 65°C to +150°C
Ambient Temperature under Bias
55°C to +125°C
Junction Temperature under Bias
55°C to +150°C
V
CC
Pin Potential to Ground Pin 0.5V to +7.0V
Input Voltage (Note 2)
0.5V to +7.0V
Input Current (Note 2)
30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with V
CC
= 0V)
Standard Output
0.5V to V
CC
3-STATE Output 0.5V to +5.5V
Current Applied to Output
in LOW State (Max) twice the rated I
OL
(mA)
Free Air Ambient Temperature 0
°C to +70°C
Supply Voltage
+4.5V to +5.5V
Symbol Parameter Min Typ Max Units
V
CC
Conditions
V
IH
Input HIGH Voltage 2.0 V Recognized as a HIGH Signal
V
IL
Input LOW Voltage 0.8 V Recognized as a LOW Signal
V
CD
Input Clamp Diode Voltage 1.2 V Min I
IN
= 18 mA
V
OH
Output HIGH 10% V
CC
2.5
VMin
I
OH
= 1 mA
Voltage 5% V
CC
2.7 I
OH
= 1 mA
V
OL
Output LOW Voltage 10% V
CC
0.5 V Min I
OL
= 20 mA
I
IH
Input HIGH Current 5.0 µAMaxV
IN
= 2.7V
I
BVI
Input HIGH Current
7.0 µAMaxV
IN
= 7.0V
Breakdown Test
I
CEX
Output HIGH
50 µAMaxV
OUT
= V
CC
Leakage Current
V
ID
Input Leakage
4.75 V 0.0
I
ID
= 1.9 µA,
Tes t All Other Pins Grounded
I
OD
Output Leakage
3.75 µA0.0
V
IOD
= 150 mV,
Circuit Current All Other Pins Grounded
I
IL
Input LOW Current 0.6 mA Max V
IN
= 0.5V
I
OS
Output Short-Circuit Current 60 150 mA Max V
OUT
= 0V
I
CC
Power Supply Current 72 mA Max

74F676SCX

Mfr. #:
Manufacturer:
ON Semiconductor / Fairchild
Description:
Counter Shift Registers 16-Bit Shft Register
Lifecycle:
New from this manufacturer.
Delivery:
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